Synopsis

It is the dark century and the people are suffering under the rule of the devil, Vandel, who is able to manipulate monsters. The Vandel Busters are a group of people who hunt these devils, and among them, the Zenon Squad is known to be the strongest busters on the continent. A young boy, Beet, dreams of joining the Zenon Squad. However, one day, as a result of Beet's fault, the Zenon squad was defeated by the devil, Beltose. The five dying busters sacrificed their life power into their five weapons, Saiga. After giving their weapons to Beet, they passed away. Years have passed since then and the young Vandel Buster, Beet, begins his adventure to carry out the Zenon Squad's will to put an end to the dark century.

Let me state first that i had a great expectations of 2nd season of this anime. The prequel provided great introduction to the world and left the story at fairly interesting point. That is why i don't fully understand this continuation. The 2nd season fails as a sequel up to a point that it could be even called a side story. No, maybe a GIANT filler fits it better.
All ideas and setups that made the 1st that much interesting are basically abandoned in this season. An entirely different set of allies and enemies. No more experience points and guilds, no ranks, no more adventures
either. Out a freaking blue, due to some "forced" circumstances, the whole team forgets about their dreams and goals and decides to grow roots in one place for the whole 25 episodes. For those that expected some follow up of the main story it's a big disappointment.
Having that much in mind - Excellion became boring. This season defines the average. It doesn't leave a bad taste but definitely wouldn't feel like watch it again.

First things first. My "reviews" system is explained on a blog entry. Which can be found through my profile.

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So what even happened? I did enjoy the first season a lot. Whilst this one just bored me to death and thus dropped. The whole season (the whole 13 episodes I watched) felt as a filler season. Basically plot about Beet and his team crashing into city and camping there for the rest of the anime. Random boring villains get sent to attack the city and Beet team defends. Also the main enemy is also quite boring. I quickly skipped to the last episodes to see whats
going on and yeah...indeed it's all about the warden.

Point being, fights were boring, villains and characters felt useless. And the whole Beet training the tengeki was also quite a boring presentation.

I'm not sure what happened here, but one thing for sure. In comparison of the first season, the second one is utter letdown and boredom.